package com.atguigu.netty.codec1;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.protobuf.ProtobufEncoder;

/**
 * @author: 叶子
 * @date: 2022/02/08 18:14
 **/
public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
//        客户端需要一个事件循环组
        NioEventLoopGroup group = new NioEventLoopGroup();
        try {
//        创建客户端启动对象
//        客户端使用的不是ServerBootstrap 而是Bootstrap
        Bootstrap bootstrap = new Bootstrap();
//        设置相关参数，链式编程
            bootstrap.group(group)//设置线程组
                    .channel(NioSocketChannel.class)//设置客户端通道的实现类（反射）
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
//                       在pipeline中加入ProtoBufEncoder
                            ChannelPipeline pipeline = ch.pipeline();
                            pipeline.addLast("encoder",new ProtobufEncoder());
                            pipeline.addLast(new NettyClientHandler());//加入自己的处理器
                        }
                    });
            System.out.println("客户端 ok...");
            //启动客户端去连接服务器端
            //关于ChannelFuture 要分析，涉及到Netty的异步模型
            ChannelFuture channelFuture = bootstrap.connect("127.0.0.1", 6668).sync();
            //给关闭通道进行监听
            channelFuture.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }
    }
}